EP 1236553 A1 20020904 - Core drill
Title (en)
Core drill
Title (de)
Hohlbohrwerkzeug
Title (fr)
Trépan carottier
Publication
Application
Priority
KR 20010008264 A 20010219
Abstract (en)
The present invention relates to a core drill (10) wherein initial drilling workability is improved through reduced frictional resistance on the segment tips (30), when they are seated on the surface of an article to start cutting operation, and wherein cutting scraps or sludge produced by the segment tips (30) are smoothly discharged through the helical grooves (20b) formed on the core body (20) so as to reduce the friction between the core body (20) and the cutting scraps or sludge, whereby both the cooling and cutting performance of the core drill are improved. The invention proposes a core drill (10) with a cylindrical core body (20) with a predetermined diameter and length and with plural cutting segments (30) provided on the lower part of a core body (20) at a finite interval, wherein the cutting thickness surface of the cutting segment consists of inclined sharp thickness portion (30a) for decreased frictional resistance with an article to be processed.
IPC 1-7
IPC 8 full level
B23B 51/04 (2006.01); B28D 1/04 (2006.01); B28D 1/14 (2006.01); E21B 10/48 (2006.01)
CPC (source: EP KR US)
B28D 1/041 (2013.01 - EP US); E21B 10/48 (2013.01 - KR); Y10T 408/81 (2015.01 - EP US)
Citation (search report)
- [X] EP 0985505 A2 20000315 - ATOCK CO LTD [JP], et al
- [X] DE 1583845 A1 19700924 - ZENTRALES REPARATUR UND AUSRUE
- [XY] US 3153885 A 19641027 - KELLER CHAUNCEY A R, et al
- [Y] DE 29903946 U1 19990602 - RUKO GMBH PRAEZISIONSWERKZEUGE [DE]
- [A] AT 373196 B 19831227 - SWAROVSKI TYROLIT SCHLEIF [AT]
- [A] US 6007279 A 19991228 - MALONE JR JOHN M [US]
- [A] PATENT ABSTRACTS OF JAPAN vol. 012, no. 105 (M - 681) 6 April 1988 (1988-04-06)
- [A] PATENT ABSTRACTS OF JAPAN vol. 015, no. 386 (M - 1163) 30 September 1991 (1991-09-30)
Designated contracting state (EPC)
DE
DOCDB simple family (publication)
EP 1236553 A1 20020904; EP 1236553 B1 20081231; DE 60137190 D1 20090212; JP 2002239823 A 20020828; JP 3603052 B2 20041215; KR 100440871 B1 20040719; KR 20020067856 A 20020824; US 2002112895 A1 20020822; US 6564887 B2 20030520
DOCDB simple family (application)
EP 01401641 A 20010621; DE 60137190 T 20010621; JP 2001190848 A 20010625; KR 20010008264 A 20010219; US 88710201 A 20010625